Impact of Regeneration on the Dosimetric Properties of LiF:Mg,Cu,P (MCP-N) Detectors

This study evaluates the dosimetric properties of standard (SD) and regenerated (RD) MCP-N thermoluminescent detectors over a wide dose range from mGy to Gy, with particular emphasis on the influence of readout mode, dose level, and temporal stability on detector performance. A total of 17 SD and 18 RD detectors were analyzed under standard conditions using two readout modes: a three-step READER mode and a continuous ANALYSER mode. Both detector types exhibit good linearity; however, deviations from ideal behavior at higher doses suggest the involvement of additional trapping and recombination processes. Glow-curve analysis indicates modifications in RD detectors, reflected by enhanced low-temperature peaks and slight shifts in peak position. Temporal effects also influence detector response, with stabilization observed after repeated irradiation–readout cycles. Fading remains low, with relatively stable signal levels over time. The results show that the ANALYSER mode provides improved stability and reproducibility compared to the READER mode, especially at higher doses, where increased variability and certain limitations were observed. Overall, regenerated detectors, despite reduced sensitivity, achieve performance comparable to standard detectors after stabilization. Optimization of readout conditions, particularly the use of ANALYSER mode, is essential for ensuring reliable dosimetric performance across a wide dose range.